[2] On June 14, 1935, a disastrous flood crested the Llano River at 41.5 feet (10 m), washing out the two truss spans, as well as the center pier, of the 1930 bridge of State Highway 9 across the Llano River in Mason County, Texas.

The Texas Highway Department appealed to the Bureau of Public Roads (BPR) for emergency relief highway funds as provided for under Section 3 of the Hayden-Cartwright Act of 1934.

In addition to extending federal relief funding established under the National Industrial Recovery Act of 1933, the Hayden-Cartwright Act provided emergency funds for the repair or reconstruction of highways and bridges on the federal aid system/”[4] The bridge consists of two riveted Warren polygonal-chord through truss spans, 12 concrete girder approach spans and two steel I-beam spans.

By the late 1930s, the northern portion of State Highway 9 between the Texas Panhandle and San Antonio had become US 87.

As of 2014, the bridge serves southbound lanes on US 87 linking Mason with Fredericksburg.